<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>新版弹性盒模型</title>
		<style type="text/css">
			*{
				margin: 0px;
			}
			#box{
			 height: 200px;
			 outline: 1px solid #0062CC;
			 display: flex;
			}
			#box div{
				 width: 50px;
				 height: 50px;
				 background-color: #007AFF;
				 margin: auto;
			}
		</style>
	</head>
	<body>
		<div id="box">
			<div></div>
			<div></div>
			<div></div>
			<div></div>
		</div>
	</body>
</html>
